serialdriver: remove version check

We now install our pyserial fork from pypi, so this check shouldn't be
required any longer. Note that distributions are also free to pick up
our patches for pyserial and integrate them into their distro packages,
which makes this check potentially wrong anyway.

Signed-off-by: Rouven Czerwinski <r.czerwinski@pengutronix.de>
(cherry picked from commit 1e9ca51)

Author: Emantor

labgrid/driver/serialdriver.py

@@ -1,5 +1,4 @@
 import logging
-import warnings
 
 import attr
 from packaging import version
@@ -27,12 +26,6 @@ class SerialDriver(ConsoleExpectMixin, Driver, ConsoleProtocol):
         bindings = {"port": "SerialPort", }
     else:
         bindings = {"port": {"SerialPort", "NetworkSerialPort"}, }
-    if version.parse(serial.__version__) != version.Version('3.4.0.1'):
-        message = ("The installed pyserial version does not contain important RFC2217 fixes.\n"
-                   "You can install the labgrid fork via:\n"
-                   "pip uninstall pyserial\n"
-                   "pip install https://github.com/labgrid-project/pyserial/archive/v3.4.0.1.zip#egg=pyserial\n")
-        warnings.warn(message)
 
     txdelay = attr.ib(default=0.0, validator=attr.validators.instance_of(float))
     timeout = attr.ib(default=3.0, validator=attr.validators.instance_of(float))